I am dealing with JPEG's with metadata is three locations:

1. Metadata provided by photoshop 5.5 or lower place the IPTC data in the "header" of the image file before the image data.
2. Metadata provided by SCC MediaGrid places the IPTC data after the image data if the "footer" of the image file.
3. XMP data is entered by photoshop cs and up and is placed in yet a third location.

My question is, is there a way to force the exif tool to write to both the "header" and "footer" of the file?

I notice that the "application version" tags contain different data based on where the IPTC data is stored. Can I specify where the IPTC data is inserted with the ExifTool by specifying which Application Version is being used?